"For by one offering he hath perfected for ever them that are sanctified." (Heb. 10:14)
"But to him that worketh not, but believeth on him that justifieth the ungodly, his faith is counted for righteousness. Even as David also describeth the blessedness of the man, unto whom God imputeth righteousness without works, Saying, Blessed are they whose iniquities are forgiven, and whose sins are covered. Blessed is the man to whom the Lord will not impute sin." (Rom. 4:5-8)
Have you ever heard the expression "Nobody's perfect?" That isn't true. In God's eyes, the SOULS of all His saints ARE perfect, because they have placed their faith in the Lord Jesus Christ for Salvation. Jesus shed His sinless blood to pay for my sins. He OFFERED Himself as a PAYMENT for my sin. He paid my sin debt because I couldn't. By receiving Him as my Savior, I am also receiving the fact that He has PAID for my sins and that I can now REST in His finished work, because my sins are GONE! My soul (not my flesh) has been made PERFECT through the completed Blood Atonement of the Lord Jesus Christ, and I KNOW I'm going to Heaven!